What does PM2 5 mean when it is often mentioned in the environment these days?

Take a look at what I've got

Let's take a look at the meaning first:

Particulate matter with a particle size of less than 10 microns is usually referred to as PM10, also known as inhalable particulate matter or dust. The smaller the diameter of the particles, the deeper they enter the respiratory tract. Particulate matter with a diameter of 10 microns is usually deposited in the upper respiratory tract, 5 microns in diameter can enter the deep part of the respiratory tract, and below 2 microns can penetrate 100% into the bronchioles and alveoli.

Then it is explained that PM10 is included, but it is impossible to determine the amount of PM10 alone, but it is the most reflective indicator of the curative ability of particulate matter.

From the current known information, the impact on human health is the greatest, especially some highly toxic organic matter is basically concentrated in particles.

PM, the full name of particulate matter in English. Scientists use this to indicate the amount of such particles per cubic meter of air, and the higher this value, the more severe the air pollution.

Refers to particulate matter in the atmosphere that is less than or equal to a micron in diameter, also known as particulate matter that can enter the lungs. Its diameter is less than 1 20 of the thickness of a human hair. Although it is only a small component of the Earth's atmosphere, it has important implications for air quality and visibility.

If the normal value is less than 75 micrograms of cubic meters in 24 hours, the standard is reached. Refers to atmospheric particles with a diameter of less than or equal to microns, also known as particles that can enter the lungs.

The particle size is small, contains a large number of toxic and harmful substances, has a long residence time in the atmosphere, and the transportation distance is long. In short, it will affect air quality, which will have a greater impact on human health and the quality of the atmospheric environment. Although it is only a small part of the composition of the Earth's atmosphere, it has a significant impact on things like air quality and visibility.

Its filtration methods include air conditioners, humidifiers, Wang Kuan air purifiers, etc., and some green plants can also be raised, plant leaves have a large surface area, which can absorb harmful gases and adsorb, in addition, outdoor exercise should be avoided when the level is high.

Significance of the indicator. It refers to particulate matter in the atmosphere with a diameter of less than or equal to microns, also known as particulate matter that can enter the lungs. Its diameter is less than 1 20 of the thickness of a human hair.

Although it is only a small part of the Earth's atmosphere, it has important effects on air quality and visibility.

Compared with coarser atmospheric particulate matter, the particle size is small, rich in a large number of toxic and harmful substances, and the residence time in the atmosphere is long, and the transportation distance is long, so it has a greater impact on human health and atmospheric environmental quality.

In February 2013, the National Committee for the Examination and Approval of Scientific and Technological Terminology named the Chinese name Fine Particulate Matter. The chemical composition of fine particulate matter mainly includes organic carbon (OC), elemental carbon (EC), nitrate, sulfate, ammonium salt, sodium salt (Na+), etc. It is very harmful to the human body.

So we're going to wear masks. Nine-headed eagle mask, multiple nanotechnology filtration. Still worried?

Dust with a diameter greater than millimeters.

The size of the inhalable particle particles.

It's not good for your health, so it's best to have a mask at home and bring it with you.

I'll take it home at >> o'clock

Particulate matter with a diameter of less than or equal to microns is the main culprit of haze weather. Fog and haze are not the same weather phenomenon.

Fog is formed by a large number of small water droplets or Xiaoice crystals floating in the air, haze is formed by tiny dust particles and smoke particles in the atmosphere, and haze is a general term for various suspended matter in the air that exceeds the standard. For example, Chai Jing's documentary "Under the Dome" can deeply see the impact of haze on the human body.

Refers to particulate matter in the atmosphere with a diameter of less than or equal to it, which is a measure of the cleanliness of the environment.

Refers to particulate matter in the atmosphere (particulate matter) with a diameter of less than or equal to microns. It is an indicator of tiny particulate matter suspended in the air. These particulate matter can come from both natural sources (e.g., dust, pollen, sea salt, etc.) and anthropogenic sources (e.g., industrial emissions, vehicle exhaust, coal burning, etc.).

is less than or equal to microns in diameter, so it is relatively small, able to be suspended in the air for a long time, and can also penetrate deeper into the respiratory tract. Due to its tiny size and suspension, particulate matter has a greater impact on people. Particulate matter is also considered to be one of the main components of air pollution, and its concentration can lead to a decrease in air quality, which can have a negative impact on the environment and ecosystems.

Therefore, monitoring and controlling concentrations is essential to protect human health and improve air quality. Monitoring stations have been set up in all cities and districts of the city, and relevant air quality indices and control measures have been developed according to the concentration situation to reduce the adverse impact on the environment.

impact

1. Reduced visibility: high concentrations will cause air turbidity and reduce the visibility of the air. When the concentration of particulate matter is high, phenomena such as smog will appear in the air, which will affect people's visual perception and even affect traffic safety.

2. Environmental impact: Particulate matter also has a negative impact on the environment. High concentrations will be deposited in soil, water and other environments, causing pollution to plant growth and water quality, and destroying the ecological balance.

3. Climate change: Particulate matter may also have a certain impact on climate change. Large amounts of particulate matter can absorb and scatter solar radiation, affecting the energy balance of the atmosphere, which in turn affects climate patterns and meteorological phenomena.

Air refers to fine particulate matter. Fine particulate matter refers to particulate matter in ambient air, which can be suspended in the air for a long time, and the higher its concentration in the air, the more serious the air pollution. Although it is only a small component of the Earth's atmosphere, it has an important impact on air quality and visibility.

Air refers to fine particulate matter. Fine particulate matter refers to particulate matter in ambient air with an aerodynamic equivalent diameter of less than or equal to microns, which can be suspended in the air for a long time, and the higher its concentration in the air, the more serious the air pollution. Although it is only a small component of the Earth's atmosphere, it has important effects on air quality and visibility, among other things.